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| author | Fabio M. De Francesco <fmdefrancesco@gmail.com> | 2023-03-15 13:52:56 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-05-11 23:17:24 +0900 |
| commit | e3c4de959c9c5d663a12a4d0fd336f757c3739d7 (patch) | |
| tree | dedd7e0af0de871918341164afcbe025d02e70ac /kernel | |
| parent | bdeb51863f9d18b85afeb75da439105154e1184a (diff) | |
| download | linux-stable-e3c4de959c9c5d663a12a4d0fd336f757c3739d7.tar.gz linux-stable-e3c4de959c9c5d663a12a4d0fd336f757c3739d7.tar.bz2 linux-stable-e3c4de959c9c5d663a12a4d0fd336f757c3739d7.zip | |
module/decompress: Never use kunmap() for local un-mappings
[ Upstream commit 3c17655ab13704582fe25e8ea3200a9b2f8bf20a ]
Use kunmap_local() to unmap pages locally mapped with kmap_local_page().
kunmap_local() must be called on the kernel virtual address returned by
kmap_local_page(), differently from how we use kunmap() which instead
expects the mapped page as its argument.
In module_zstd_decompress() we currently map with kmap_local_page() and
unmap with kunmap(). This breaks the code and so it should be fixed.
Cc: Piotr Gorski <piotrgorski@cachyos.org>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Luis Chamberlain <mcgrof@kernel.org>
Cc: Stephen Boyd <swboyd@chromium.org>
Cc: Ira Weiny <ira.weiny@intel.com>
Fixes: 169a58ad824d ("module/decompress: Support zstd in-kernel decompression")
Signed-off-by: Fabio M. De Francesco <fmdefrancesco@gmail.com>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Piotr Gorski <piotrgorski@cachyos.org>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/module/decompress.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/module/decompress.c b/kernel/module/decompress.c index bb79ac1a6d8f..7ddc87bee274 100644 --- a/kernel/module/decompress.c +++ b/kernel/module/decompress.c @@ -267,7 +267,7 @@ static ssize_t module_zstd_decompress(struct load_info *info, zstd_dec.size = PAGE_SIZE; ret = zstd_decompress_stream(dstream, &zstd_dec, &zstd_buf); - kunmap(page); + kunmap_local(zstd_dec.dst); retval = zstd_get_error_code(ret); if (retval) break; |